彭世彰, 杨士红, 徐俊增. 控制灌溉对稻田CH4和N2O综合排放及温室效应的影响[J]. 水科学进展, 2010, 21(2): 235-240.
引用本文: 彭世彰, 杨士红, 徐俊增. 控制灌溉对稻田CH4和N2O综合排放及温室效应的影响[J]. 水科学进展, 2010, 21(2): 235-240.
PENG Shi-zhang, YANG Shi-hong, XU Jun-zeng. Influence of controlled irrigation on CH4 and N2O emissions from paddy fields and subsequent greenhouse effect[J]. Advances in Water Science, 2010, 21(2): 235-240.
Citation: PENG Shi-zhang, YANG Shi-hong, XU Jun-zeng. Influence of controlled irrigation on CH4 and N2O emissions from paddy fields and subsequent greenhouse effect[J]. Advances in Water Science, 2010, 21(2): 235-240.

控制灌溉对稻田CH4和N2O综合排放及温室效应的影响

Influence of controlled irrigation on CH4 and N2O emissions from paddy fields and subsequent greenhouse effect

  • 摘要: 采用静态箱-气象色谱法对控制灌溉稻田CH4和N2O排放进行了观测,研究控制灌溉模式对稻田CH4和N2O排放的影响,并对其温室效应进行了评估。结果表明,控制灌溉稻田CH4排放通量明显低于淹水灌溉稻田,且主要集中在分蘖前期和中期,全生育期CH4排放量比淹水灌溉稻田减少73.2%~85.0%。控制灌溉稻田N2O排放通量在水稻全生育期大部分时间都要大于淹水灌溉稻田,稻季N2O排放量分别为106.65 mg/m2和96.40 mg/m2,控灌稻田较淹灌稻田增加了10.6%。控制灌溉稻田稻季排放CH4和N2O的全球增温潜势(GWPs)为726 kg/hm2,较淹水灌溉稻田减少了59.1%。控制灌溉模式能显著降低CH4和N2O综合排放的全球增温潜势。

     

    Abstract: The methane (CH4) and nitrous oxide (N2O) emissions from controlled irrigation paddy fields were observed by using the static chamber gas chromatography (GC) method.The objective of the study is to investigate the influence of the controlled irrigation technique on the CH4 and N2O emission process and the subsequent greenhouse effect.The results show that during a life cycle of rice crop,the total CH4 emission from the controlled irrigation paddy field can be reduced by as much as 73.2% to 85.0% compared to that from the flood irrigation ones,and the emission is found to be most active in the early to mid-tillering stage of rice growth.By contrast,controlled irrigation would lead to a 10.6% increase in the total N2O emission from paddy fields during the most tmie of rice growth.The average N2O emissions from controlled and flood irrigation paddy fields are 106.65mg/m2 and 96.40 mg/m2,respectively.It is estmiated that the global warming potential (GWPs) contributed by CH4 and N2O emissions from controlled irrigation paddy fields would be 726 kg/hm2,which should result in a 59.1% emission reduction compared with that from flood irrigation ones.Our study suggests that using the controlled irrigation technique would significantly reduce CH4 and N2O emissions and the subsequent GWPs.

     

/

返回文章
返回